Raymarine A06074 SeaTalkNG In-Line Terminator

Raymarine A06074 – SeaTalkNG In-Line Terminator

The A06074 is a SeaTalkNG in-line terminator — a specialised termination component that terminates the SeaTalkNG backbone at a backbone connector rather than at an end-cap plug. Unlike the standard A06031 backbone end-cap terminator, which plugs into an open backbone port to seal and terminate it, the A06074 sits inline within the backbone run itself, allowing the backbone cable to pass through while still providing the required 120-ohm termination at that point. It is used in specific SeaTalkNG network layouts where the logical end of the backbone occurs at a mid-cable location rather than at an open port.

Product Details

• Part Number: A06074
• Brand: Raymarine
• Type: SeaTalkNG In-Line Backbone Terminator
• Function: Terminates the SeaTalkNG backbone at an inline connection point
• Connector Type: SeaTalkNG blue backbone connectors (inline)
• System: SeaTalkNG / NMEA 2000-compatible network backbone
• SKU: 152-A06074

In-Line vs. End-Cap Terminator — Which Do You Need?

Most SeaTalkNG installations use the standard A06031 end-cap terminator, which plugs into the open backbone port at each physical end of the backbone trunk. The A06074 in-line terminator is needed in specific situations where the backbone layout requires termination at a point that is not an open port — for example, in a looped or branched network segment, or as directed by a Raymarine system diagram for a specific installation type. If you are building a standard linear backbone, the A06031 is almost certainly what you need. If your installation diagram specifically calls for an in-line terminator, use the A06074.

Compatible Applications

• SeaTalkNG backbone installations where the system layout requires in-line termination at a mid-cable point
• Specific Raymarine-recommended installation configurations that call for the A06074 in the network diagram
• Network layouts involving branched or non-standard backbone topologies requiring termination within the cable run
• Replacement of an existing in-line terminator in an installation already built to this specification

System Overview

Every SeaTalkNG backbone must be terminated at both logical ends of the network to prevent signal reflections that cause network errors and device dropouts. In a standard linear backbone, both ends are open ports that accept an end-cap terminator. In certain non-standard or Raymarine-specified layouts, one or both termination points may occur at an inline connector position, which is where the A06074 is used. The backbone must always have exactly two termination points — no more, no less.

Parts Desk Insights

Best Use Case: The A06074 is a specialist component for non-standard SeaTalkNG backbone configurations. If a customer’s Raymarine installation guide or system diagram specifically references an in-line terminator at a particular backbone position, this is the correct part. It is not a general-purpose substitution for the standard end-cap terminator.

Common Issues: The most frequent ordering mistake is purchasing the A06074 when the standard A06031 end-cap terminator is what the installation actually requires. If you are not certain which terminator your layout needs, check the backbone diagram in your Raymarine system documentation. Using an in-line terminator in place of an end-cap terminator (or vice versa) at the wrong position can result in a network that won’t initialise or has intermittent device dropouts. Always verify the correct terminator type against the installation diagram before ordering.

Related Products & Accessories

• Raymarine A06031 SeaTalkNG Backbone Terminator — Standard end-cap terminator for open backbone ports — used in most installations
• Raymarine A06028 SeaTalkNG T-Piece Connector — Single-spur backbone junction
• Raymarine A06064 SeaTalkNG 5-Way Connector Block — Multi-device backbone junction
• Raymarine A06049 SeaTalkNG Power Cable — Backbone power feed
• Raymarine A06033 SeaTalkNG Backbone Cable – 400mm — Short backbone segment
• Raymarine A06034 SeaTalkNG Backbone Cable – 1M — Backbone trunk cable
• Raymarine A06035 SeaTalkNG Backbone Cable – 3M — Mid-length backbone cable
• Raymarine A06036 SeaTalkNG Backbone Cable – 5M — Longer backbone cable
• Raymarine A06068 SeaTalkNG Backbone Cable – 9M — Longest backbone cable
• Raymarine E22158 SeaTalkNG Backbone Kit — Complete backbone hardware kit
• Raymarine T70134 SeaTalkNG Starter Kit — Entry-level network kit

Technical FAQ

How is this different from the A06031 terminator?
The A06031 is an end-cap terminator that plugs into an open backbone port to seal and terminate it — the standard choice for the two physical ends of a linear backbone. The A06074 terminates the network at an inline backbone connector within the cable run, for use in specific non-standard layout configurations. If your system diagram does not specifically call for an in-line terminator, order the A06031 instead.

How many terminators does a backbone need?
Every SeaTalkNG backbone requires exactly two terminators — one at each logical end of the network. The type of terminator at each end (end-cap or in-line) depends on the specific installation layout.

Can I use this on a standard linear backbone instead of the A06031?
It is not the intended application. In a standard linear backbone, the ends are open backbone ports that accept an end-cap terminator. Using the A06074 in place of the A06031 in a standard layout may introduce wiring complexity without benefit. Follow your installation diagram.

Is this compatible with NMEA 2000 backbones?
SeaTalkNG uses Raymarine’s proprietary blue backbone connectors. If you are using a DeviceNet NMEA 2000 backbone, NMEA 2000 terminators use the standard DeviceNet connector format. This terminator is for SeaTalkNG backbones only.